• 1635 Citations
  • 22 h-Index
19952019

Research output per year

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Research Output

2012

Effects of spray impingement, injection parameters, and EGR on the combustion and emission characteristics of a PCCI diesel engine

Kiplimo, R., Tomita, E., Kawahara, N. & Yokobe, S., May 1 2012, In : Applied Thermal Engineering. 37, p. 165-175 11 p.

Research output: Contribution to journalArticle

159 Citations (Scopus)

Spectrum analysis of chemiluminescence of a low sooting PCCI diesel engine operating with moderately early injection timing

Kiplimo, R., Tomita, E., Kawahara, N. & Yokobe, S., Dec 1 2012, p. 410-415. 6 p.

Research output: Contribution to conferencePaper

UV-visible light absorption by hydroxyl and formaldehyde and knocking combustion in a DME-HCCI engine

Azimov, U., Kawahara, N. & Tomita, E., Aug 1 2012, In : Fuel. 98, p. 164-175 12 p.

Research output: Contribution to journalArticle

21 Citations (Scopus)

In-cylinder observations of chemiluminescence in turbulent premixed flames using a spark plug sensor with an optical fiber

Kawahara, N., Inoue, A. & Tomita, E., Jan 1 2013, In : SAE Technical Papers. 11

Research output: Contribution to journalConference article

Interaction between laser-induced plasma and fuel spray

Kawahara, N., 2013, In : The 1st Laser Ignition Conference. LIC83, p. 1-2 2 p.

Research output: Contribution to journalArticle

Jet-guided combustion characteristics and local fuel concentration measurements in a hydrogen direct-injection spark-ignition engine

Roy, M. K., Kawahara, N., Tomita, E. & Fujitani, T., Jan 11 2013, In : Proceedings of the Combustion Institute. 34, 2, p. 2977-2984 8 p.

Research output: Contribution to journalArticle

19 Citations (Scopus)

Mixing process of direct injection hydrogen jet in a constant volume vessel by using spark-induced breakdown spectroscopy

Bin Abdul Rahman, M. T., Kawahara, N. & Tomita, E., Jan 1 2013, In : SAE Technical Papers. 11

Research output: Contribution to journalConference article

2 Citations (Scopus)
2014

Laser-induced plasma generation and evolution in a transient spray

Kawahara, N., Tsuboi, K. & Tomita, E., Jan 13 2014, In : Optics Express. 22, 1, p. A44-A52

Research output: Contribution to journalArticle

16 Citations (Scopus)
7 Citations (Scopus)
2015
6 Citations (Scopus)

Effect of Bio-Gas Contents on SI Combustion for a Co-Generation Engine

Kim, Y., Kawahara, N., Tomita, E., Oshibe, H. & Nishikawa, K., Sep 1 2015, In : SAE Technical Papers. 2015-September, September

Research output: Contribution to journalArticle

4 Citations (Scopus)

Effect of Hydrogen Concentration on Engine Performance, Exhaust Emissions and Operation Range of PREMIER Combustion in a Dual Fuel Gas Engine Using Methane-Hydrogen Mixtures

Aksu, C., Kawahara, N., Tsuboi, K., Nanba, S., Tomita, E. & Kondo, M., Sep 1 2015, In : SAE Technical Papers. 2015-September, September

Research output: Contribution to journalArticle

2 Citations (Scopus)

Experimental study on combustion characteristics of wet ethanol ignited by Laser-induced breakdown

Rahman, K. M., Kawahara, N., Tsuboi, K. & Tomita, E., Apr 20 2015, Laser Ignition Conference, LIC 2015. OSA - The Optical Society, (Laser Ignition Conference, LIC 2015).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Experimental study on combustion characteristics of wet ethanol ignited by Laser-induced breakdown

Rahman, K. M., Kawahara, N., Tsuboi, K. & Tomita, E., Apr 20 2015, Laser Ignition Conference, LIC 2015. OSA - The Optical Society, (Laser Ignition Conference, LIC 2015).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Spark discharge ignition process in a spark-ignition engine using a time series of spectra measurements

Kawahara, N., Hashimoto, S. & Tomita, E., Dec 1 2015, In : Proceedings of the Combustion Institute. 36, 3, p. 3451-3458 8 p.

Research output: Contribution to journalArticle

17 Citations (Scopus)
2016

Combustion characteristics and NOX emissions of biogas fuels with various CO2 contents in a micro co-generation spark-ignition engine

Kim, Y., Kawahara, N., Tsuboi, K. & Tomita, E., Nov 15 2016, In : Applied Energy. 182, p. 539-547 9 p.

Research output: Contribution to journalArticle

29 Citations (Scopus)

Combustion characteristics of wet ethanol ignited using a focused Q-switched Nd:YAG nanosecond laser

Rahman, K. M., Kawahara, N., Tsuboi, K. & Tomita, E., Feb 1 2016, In : Fuel. 165, p. 331-340 10 p.

Research output: Contribution to journalArticle

14 Citations (Scopus)

Densitometry and temperature measurement of combustion gas by X-ray Compton scattering

Sakurai, H., Kawahara, N., Itou, M., Tomita, E., Suzuki, K. & Sakurai, Y., Mar 1 2016, In : Journal of Synchrotron Radiation. 23, 2, p. 617-621 5 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)
20 Citations (Scopus)

Local fuel concentration measurement through spark-induced breakdown spectroscopy in a direct-injection hydrogen spark-ignition engine

Rahman, K. M., Kawahara, N., Matsunaga, D., Tomita, E., Takagi, Y. & Mihara, Y., Aug 24 2016, In : International Journal of Hydrogen Energy. 41, 32, p. 14283-14292 10 p.

Research output: Contribution to journalArticle

17 Citations (Scopus)

Quantum cascade laser assisted time-resolved measurements of carbon dioxide absorption during combustion in DME-HCCI engine

Azimov, U., Kawahara, N. & Tomita, E., Oct 15 2016, In : Fuel. 182, p. 807-815 9 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2017

Characterisation of DME-HCCI combustion cycles for formaldehyde and hydroxyl UV–vis absorption

Azimov, U., Stylianidis, N., Kawahara, N. & Tomita, E., Dec 15 2017, In : Fuel. 210, p. 578-591 14 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Chemical kinetics and CFD analysis of supercharged micro-pilot ignited dual-fuel engine combustion of syngas

Stylianidis, N., Azimov, U., Maheri, A., Tomita, E. & Kawahara, N., Sep 1 2017, In : Fuel. 203, p. 591-606 16 p.

Research output: Contribution to journalArticle

10 Citations (Scopus)
1 Citation (Scopus)

High-speed visualization of fuel spray impingement in the near-wall region using a DISI injector

Kawahara, N., Kintaka, K. & Tomita, E., 2017, Selected Papers from the 31st International Congress on High-Speed Imaging and Photonics. SPIE, Vol. 10328. 1032817

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Improvement of thermal efficiency and reduction of NOx emissions by burning a controlled jet plume in high-pressure direct-injection hydrogen engines

Takagi, Y., Mori, H., Mihara, Y., Kawahara, N. & Tomita, E., Oct 12 2017, In : International Journal of Hydrogen Energy. 42, 41, p. 26114-26122 9 p.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Multidimensional CFD simulation of diesel spray combustion using chemical kinetics

Kawahara, N., Takeda, N. & Tomita, E., Jan 1 2017.

Research output: Contribution to conferencePaper

Multidimensional CFD simulation of diesel spray combustion using chemical kinetics

Kawahara, N., Takeda, N. & Tomita, E., 2017.

Research output: Contribution to conferencePaper

Visualization of combustion processes of internal combustion engines

Kawahara, N., Aug 30 2017, The Micro-World Observed by Ultra High-Speed Cameras: We See What You Don't See. Springer International Publishing, p. 261-275 15 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

2018

Differences between PREMIER combustion in a natural gas spark-ignition engine and knocking with pressure oscillations

Kawahara, N., Kim, Y., Wadahama, H., Tsuboi, K. & Tomita, E., Jan 1 2018, (Accepted/In press) In : Proceedings of the Combustion Institute.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Numerical Investigation of Natural Gas-Diesel Dual Fuel Engine with End Gas Ignition

Talekar, A., Lai, M. C., Tomita, E., Kawahara, N., Zeng, K. & Yang, B., 2018, In : SAE Technical Papers. 2018-April

Research output: Contribution to journalConference article

3 Citations (Scopus)
2019

3D CFD of auto-ignition at the end gas region in dual-fuel gas engine

Kawahara, N. & Tomita, E., Jan 1 2019.

Research output: Contribution to conferencePaper

Attainment of High Thermal Efficiency and Near-zero Emissions by Optimizing Injected Spray Configuration in Direct Injection Hydrogen Engines

Oikawa, M., Takagi, Y., Mihara, Y., Kawahara, N., Tomita, E. & Naitoh, K., Dec 19 2019, In : SAE Technical Papers. December

Research output: Contribution to journalConference article

CO2 concentration measurements inside expansion-compression engine under high EGR conditions using an infrared absorption method

Ahmed, F. B. M., Esmail, M. F. C., Kawahara, N. & Tomita, E., 2019, (Accepted/In press) In : Ain Shams Engineering Journal.

Research output: Contribution to journalArticle

Open Access

End-gas autoignition characteristics of PREMIER combustion in a pilot fuel-ignited dual-fuel biogas engine

Valipour Berenjestanaki, A., Kawahara, N., Tsuboi, K. & Tomita, E., Oct 15 2019, In : Fuel. 254, 115634.

Research output: Contribution to journalArticle

Plasma Temperature of Spark Discharge in a Lean-burn Spark-ignition Engine Using a Time Series of Spectra Measurements

Kawahara, N., Watanabe, M., Tomita, E., Nagano, Y. & Kitagawa, T., Dec 19 2019, In : SAE Technical Papers. December

Research output: Contribution to journalConference article